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首页> 外文期刊>Journal of drug targeting >Adaptability and elasticity of the mixed lipid bilayer vesicles containing non-ionic surfactant designed for targeted drug delivery across the skin.
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Adaptability and elasticity of the mixed lipid bilayer vesicles containing non-ionic surfactant designed for targeted drug delivery across the skin.

机译:包含非离子表面活性剂的混合脂质双层囊泡的适应性和弹性,旨在通过皮肤进行靶向药物输送。

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Novel potential carriers for non-invasive drug delivery were prepared from polyoxyethylene(20) oleyl ether (C(18:1)EO(20)) and soybean phosphatidylcholine (SPC) in different relative molar ratios, R(e); this produced stiff SPC liposomes (2r(ves) approximately 120 nm) at one end and much smaller (2r(mic) or= R(e)(sat) = 0.25 in the bilayer. The surfactant-saturated bilayers exhibit bending rigidity of kappa(c) approximately 2.1 k(B)T, as determined with an improved vesicle adaptability assay involving analysis of normalised flux density through a nano-porous barrier as an activated transport process. Pore penetrability vs. driving pressure data measured with the mixed amphiphat vesicles resemble results of computer simulation of deformable vesicles penetrating a constriction [Gompper G, Kroll DM. 1995. Driven transport of fluid vesicles through narrow pores. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics. 52:4198-4208], confirming basic similarity of both processes. The improved assay can reveal partial lipid solubilisation at R(e)>R(e)(sat), which is linearly proportional to R(e) - R(e)(sat). C(18:1)EO(20)-SPC mixed vesicles that can cross narrow pores are arguably suitable for targeted drug delivery across intact skin.
机译:由聚氧乙烯(20)油基醚(C(18:1)EO(20))和大豆磷脂酰胆碱(SPC)以不同的相对摩尔比R(e)制备了新型无创药物潜在载体。这样在一端产生了坚硬的SPC脂质体(2r(ves)约为120 nm),而在聚集谱的另一端则产生了较小的(2r(mic)<或= 15 nm),相当不可变形的混合胶束。中间存在的混合两栖小泡(2r(v)约105 nm)的变形能力随R(e)非线性增加,直到R(e)> or = R(e)(sat)的准平台=双层中的0.25。表面活性剂饱和的双层膜表现出约2.1 k(B)T的kappa(c)弯曲刚度,这是通过改进的囊泡适应性测定法确定的,该测定法包括通过作为激活的传输过程的纳米多孔屏障对归一化的通量密度进行分析。用混合amphiphat囊泡测量的孔隙渗透性与驱动压力数据类似,计算机模拟穿透狭窄的可变形囊泡的结果[Gompper G,Kroll DM。 1995.通过狭窄的孔驱动流体囊泡的运输。 Phys Rev E Stat等离子流体相关的跨学科主题。 52:4198-4208],证实了这两个过程的基本相似性。改进的测定法可以揭示在R(e)> R(e)(sat)处部分脂质增溶,其与R(e)-R(e)(sat)成线性比例。可以穿越狭窄毛孔的C(18:1)EO(20)-SPC混合囊泡可以说是适用于跨完整皮肤的靶向药物输送的。

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